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  1. Triton is the largest of Neptune's 13 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit. Scientists think Triton is a Kuiper Belt Object captured by Neptune's gravity millions of years ago.

  2. Triton dominates the Neptunian moon system, with over 99.5% of its total mass. This imbalance may reflect the elimination of many of Neptune's original satellites following Triton's capture. [4][5] Triton (lower left) compared to the Moon (upper left) and Earth (right), to scale. Triton is the seventh-largest moon and sixteenth-largest object ...

  3. science.nasa.gov › neptune › neptune-moonsTriton - NASA Science

    Overview. Triton is the largest of Neptune's 13 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit. Scientists think Triton is a Kuiper Belt Object captured by Neptune's gravity millions of years ago.

  4. Triton, also known as Neptune I, is the biggest natural satellite of the outer planet, Neptune. It is the seventh-largest moon in the Solar System. It has a retrograde, inclined orbit around Neptune. [1] Triton was discovered on October 10, 1846 by the astronomer William Lassell.

  5. Triton is the only large moon in the solar system that circles its planet in a direction opposite to the planet's rotation (a retrograde orbit), which suggests that it may once have been an independent object that Neptune captured.

  6. The largest by far is Triton, which is nearly the size of Earths Moon. Triton is the only large moon of the solar system that travels around its planet in retrograde fashion; that is, it orbits Neptune in the opposite direction of the planet’s rotation.

  7. Triton is the seventh largest moon in our solar system. Triton is believed to be one of the six moons geologically active in our solar system. NASA’s Voyager 2 is the only spacecraft to visit Triton.